package com.qingshu.controller;

import com.google.code.kaptcha.Producer;
import com.qingshu.common.util.captcha.CaptchaType;
import com.qingshu.common.util.constant.Constants;
import com.qingshu.common.util.redis.RedisCache;
import com.qingshu.common.util.body.CommonModel;
import com.qingshu.common.util.body.JsonResult;
import com.qingshu.common.util.body.ModelTool;
import com.qingshu.common.util.body.ResultTool;
import com.qingshu.common.util.uuid.IdUtils;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * @author Huzz
 */
@Api(tags = "验证码操作处理")
@RestController
public class CaptchaController {

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisCache redisCache;

    /**
     * 验证码类型
     */
    @Value("${qingshu.captchaType}")
    private String captchaType;

    @ApiOperation(value = "生成验证码")
    @GetMapping("/captchaImage")
    public JsonResult getCode(HttpServletResponse response) throws IOException {

        /** 保存验证码信息 */
        // 生成验证码在redis中存储的key
        String uuid = IdUtils.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        String capStr, code = null;
        BufferedImage image = null;

        /** 生成验证码 */
        // math类型验证码
        if (CaptchaType.MATH.equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);

        }
        // char类型验证码
        if (CaptchaType.CHAR.equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }
        /** 缓存验证码 */
        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        /** 转换流信息写出 */
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return ResultTool.fail(e.getMessage());
        }

        /** 定义返回数据 */
        CommonModel model = ModelTool.createModel();
        model.put("uuid", uuid);
        model.put("img", Base64.encode(os.toByteArray()));

        return ResultTool.success(model);
    }
}
